Can Guinea Pigs Eat Watermelon? Everything You Need to Know!

Can guinea pigs eat watermelon? Yes, but only in small amounts–and only if you’re very careful to remove all the seeds. In fact, while the bright red flesh looks like the best part, the green rind is even better to offer to your cavy!

As many piggy parents can attest, watermelon can be a great way to help keep your guinea pig hydrated when the mercury is soaring, and each delicious nibble is loaded with Vitamins A and C. But unfortunately, the ripe flesh also contains a lot of sugar. As a result, you should limit your cavy’s consumption of watermelon to small portions, once or twice a week.

For those that are interested, we’ll take a closer look at why and how guinea pigs can eat watermelon in greater detail, and consider the pros and cons.

Check out our Ultimate Guinea Pig Food List

Is Watermelon Good For Guinea Pigs?

Yes and no.

Just like us, guinea pigs don’t produce their own vitamins and minerals, and the only way they can get the nutrition they need is through a proper guinea pig diet.

Timothy hay, fortified pellets, and fresh veggies are the essential pillars of a cavy’s diet, supporting overall health and well-being. But Vitamin C is always a concern for guinea pigs, and natural sources of this important vitamin should be on your piggy’s menu.

Fresh fruits and fresh vegetables can be an excellent source of this critical nutrient–and that includes watermelon! Moreover, watermelon is mostly water, and a nibble here and there can help to keep your guinea pig hydrated in the summer heat.

But like most fruits, watermelon contains a lot of sugar, and cavies definitely have a sweet tooth (or two!). It’s important, then, that you limit their access to sweet treats to avoid problems like obesity and diabetes.

As the Humane Society advises, “Fruit works well as an occasional treat that is offered once a day or several times a week. Keep the portion size small since fruit is high in sugar; a small wedge of orange or apple, several blueberries, or a thin slice of banana is perfectly adequate.”

Health Risks: Is Watermelon Bad For Guinea Pigs?

In the sense that the ripe flesh is high in sugar, it’s essentially like a few cookies or a slice of cake for your cavy: a nice treat, but not something to have with every meal!

Watermelon, as its name suggests, also contains a lot of water, and it can be a great way to ensure that your guinea pig stays hydrated. It’s also a fantastic source of Vitamins A and C, packing an extra punch of magnesium and potassium, too.

But–and this is a big but–all that water can cause diarrhea and stomach upset in larger amounts, so it’s important to keep portions small. And in the context of its sugar content, this should reinforce that watermelon is a once or twice a week treat, and only ever in small pieces.

Can Guinea Pigs Eat Watermelon Rind?

Yes! The rind is completely safe for guinea pigs (and people!).

And while you may look at a watermelon and see the red flesh as the good part, your furry friend may have other ideas!

Watermelons are in the same family as cucumber, and just like this staple veggie, the skin is perfectly edible. In fact, most of the nutrient content of watermelon is actually in the rind, not the flesh. And most of the sugar is in the flesh rather than the rind.

A small piece of green rind makes an ideal treat–and it’s better for your piggy than the flesh!

In fact, the sweet, red flesh is probably best kept away from guinea pigs, while the rind you’d usually dispose of is ideal as a treat for your cavy. So the next time you have a fresh slice of watermelon, keep the rind for your piggy.

Can Guinea Pigs Eat Watermelon Seeds?


While not poisonous, watermelon seeds are just the right size to present a choking hazard for guinea pigs, and we strongly recommend you carefully remove every seed from any watermelon flesh you offer your cavies.

How Should You Prepare Watermelon For Your Guinea Pigs?

We recommend that you skip the ripe flesh altogether, and instead, offer your furry friend a small piece of watermelon rind!

Since the nutrients you’re looking for are in the rind, and since there’s less sugar there, too, the rind is the ideal summer treat for your cavy.

A small piece of rind–about 1-to 2-inches square–is plenty.

Final Thoughts

Watermelon rind can be a great summer treat for your guinea pig if you keep the following things in mind:

  • Watermelon is high in Vitamins A and C, and has plenty of magnesium and calcium, too.
  • Watermelon, like most fruits, is high in sugar.
  • It’s also high in water but can cause problems like diarrhea in larger portions.
  • Guinea pigs can eat the rind, and it’s better for them than the ripe, red flesh.
  • But they shouldn’t ever be offered the seeds, as they’re a choking hazard.
  • Like all fruits, watermelon rind should be offered in small portions, once or twice a week maximum.
  • A good serving size is a 1- to 2-inch cube.

If you stick to these guidelines, watermelon can be a fantastic addition to your cavy’s summer diet.

Benefits of watermelon

Watermelon is a delicious fruit that Guinea Pigs can enjoy. Some of the benefits of watermelon for Guinea Pigs include: providing them with essential vitamins and minerals, digestive upsets, calcium content helping to reduce their cravings, and providing them a healthy snack option.

In conclusion, guinea pigs can eat watermelon(and other fresh fruit) but should only have a small slice as it is a high-calorie fruit. The watermelon will help keep your guinea pig hydrated and is a good source of Vitamin C. Make sure to give your guinea pig plenty of fresh hay and green vegetables too!